Consideration of Visibility in the Kuiper Belt Focusing on the Placement of Objects

The purpose of this study was to investigate the ability of the Kuiper Belt to identify object shapes. In the experiment, 10 participants performed a gaze input task simulating simple menu item selection and completed questionnaires. Task completion time and error rate were used as objective measures, and usability was used as a subjective measure. During the evaluation, a Friedman test was conducted for each indicator. As a post-test, a Steel–Dwass test was conducted on the indicators for which significant differences were found. These results suggest that usability may deteriorate rapidly when the number of objects placed is 10 or more. In addition, objects were identified by referring to their vertex positions, suggesting that objects with similar vertex positions tended to be misrecognized.